Asphalt Shingle Roof Cleaning: Use bleach to clean mold from roofs

Submitted By
Tom Kraeutler
Filed Under
Asphalt, Roofing, Cleaning
Answers
1 expert, 0 community
Q:

I noticed unsightly black stains on my shingle roof a few months ago.  I'm guessing they are the fungus/mold that grows on the North side of buildings and spreads from rooftop to rooftop.  What can I use to get rid of these unsightly black stains and clean my roof?